. for investigators, the top priority is determining weather dzhokhar and hisbrother,tamerlanhadaccomplices. on thursday night the suspects hijacked an suv and according to t"the new york times," told its owner they planned to go on to new york city. >> we have reason to believe based upon the evidence that was found at the scene, the explosions, the explosive ordinance that was unexploded and the firepower that they had, that they were going to attack other individuals. >> as the investigation continues, more clues are revealed relating to the psychology of the suspects. but so far, any conclusions are few and far between. one day after the bombing, as boston mourned the dead and wounded, dzhokah tsarnaev went to parties, attended classes at his college, amherst and worked out. >> i said yeah it's a tragedy that it's happening right now, it's a sad thing. >> some suggested that dzhokah tsarnaev's brother, tamerlan was the mastermind of the plot and heavily influenced dzhokhar into participating. >> the brother was a follower. he read the magazines on how to create bombs, disrupt the genera

.s.-led wars in iraq and afghanistan. officials say his olderbrothertamerlanspenttime on jihadist websites reading extremist propaganda including inspire magazine, which is aimed at aspiring lone wolf terrorists. the last fatal victim, m.i.t. officer sean collier was laid to rest today in massachusetts. his casket watched over by a police honor guard. the mourners were led by collier's parents and five siblings. vice president joe biden will attend a public memorial tomorrow. 8-year-old martin richard was also laid to rest this morning in a private funeral. a public memorial is also being planned. as for the survivors, amazingly, only one victim is still in critical condition. 45 remain hospitalized. of the total 264 injured, boston public health commission says the number of injured has increased because some victims delayed getting medical attention and are just now seeing a doctor. boston's recovery continues as the six-block area around the marathon finish line is now reopened to businesses and residents for the first time since the attack. nbc news national investigative correspondent

will include inquiry into not only the immediate circumstances of the crime, but so whofundedtamerlantsarnaev'smonth-long so he journal abroad in 2012 and his comfortable lifestyle. did he have a supportive network? what training did he and perhaps his younger brother receive in the use of weapons? where did the elder of the two learn to make the suicide vest he reportedly wore? the investigation should include as well a deep dive into tamerlan's radicalization. the islamist references in the brother's social media communications and the jihadist websites they visited. will the investigation probe as well the f.b.i.'s own questioning of tamerlan two years ago at the behest of an unspecified foreign government, presumably russia, over his involvement with jihaddy websites and other activities? tamerlan tsarnaev is the fifth person since 9/11 who has participated in terror attacks after being questioned by the f.b.i. e was preceded by nidal hasan, drone casualty anwr an all i can, abdul hakim muhammad, born carlos he willon bledsoe, -- leon bledsoe, who murdered an army recruit in lit

investigation into his olderbrother,tamerlantsarnaevclaiming the fbi was not as thorough as it should have been. the fbi's monitoring a foreign-born citizens living within the u.s. is more complex than is being acknowledged. fbi surveillance is more complex than simply targeting people who look like they might be terrorists as former congressman joe walsh would have you think. >> we're at war and this country got a stark reminder last week, again, that we're at war. and not only should we take a pause, when it comes to our immigration, we need to begin profiling who our enemy is in this war. young, muslim men. >> john: for more on this, i'm pleased to be joined by mike german a former fbi special agent who now works as senior policy council with the aclu. pleasure to have you here, mr. german. what a resume you have. >> thank you very much. a little unusual. >> john: it is fascinating. seeing you've been on both sides of this, both monitoring extremist groups as an agent with the fbi and now working to protect people's civil rights at the aclu, how difficult is the balance between thorough

's -- and thebrother,tamerlantsarnaevhad the ploes sifs strapped to him. no indication that dzhokhar did. and he obviously tried to make an escape. so what does that tell you about his own state of mind and you know the idea some of these guys want to be a martyr to a case an if there is a cause and we don't know. some of them want to live. >> it tells me there's just what you said. there's a lot of people saying i'm willing to die but they don't necessariry want to die. this guy could have died. he could have leaned out of the boat and cranked out a couple more rounds and they would have put him down. but he chose not to. tactically they did everything they could to get him out of there alive. he could have committed that suicide. as long as we see the vid act of wanting to sur vief we have something to play with. we can dance with the devil to get information to save lives as long as we know this guy will not see the light of day outside of a prison again. >> where do you suppose they will take this line of questioning, clint? well, is that to me, chris? yeah. >> yeah. the things we're trying